Measurement of Azimuthal Asymmetries With Respect To Both Beam Charge and Transverse Target Polarization in Exclusive Electroproduction of Real Photons

Abstract

Azimuthal asymmetries in exclusive electroproduction of real photons are measured for the first time with respect to transverse target polarisation, providing new constraints on Generalized Parton Distributions. From the same data set on a hydrogen target, new results for the beam-charge asymmetry are also extracted with better precision than those previously reported. By comparing model calculations with measured asymmetries attributed to the interference between the deeply virtual Compton scattering and Bethe-Heitler processes, a model-dependent constraint is obtained on the total angular momenta carried by up and down quarks in the nucleon.

arXiv comment24 pages, 10 figures, 2 tables; 1 figure,3 references added, slight text change

References in corpus (37)

• Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
• Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
• Deeply Virtual Compton Scattering
• Nonforward Parton Distributions
• Impact Parameter Dependent Parton Distributions and Off-Forward Parton Distributions for $\zeta \to 0$
• Theory of deeply virtual Compton scattering on the nucleon
• Single-spin asymmetries: the Trento conventions
• Skewed and double distributions in pion and nucleon
• Generalized parton distributions in impact parameter space
• Deeply virtual electroproduction of photons and mesons on the nucleon : leading order amplitudes and power corrections
• Measurement of the Beam-Spin Azimuthal Asymmetry Associated with Deeply-Virtual Compton Scattering
• Nucleon Generalized Parton Distributions from Full Lattice QCD
• The HERMES Spectrometer
• Observation of exclusive DVCS in polarized electron beam asymmetry measurements
• Double distributions and evolution equations
• Generalized parton distributions from nucleon form factor data
• Femto-Photography of Protons to Nuclei with Deeply Virtual Compton Scattering
• Generalized parton distributions with helicity flip
• On the analysis of lepton scattering on longitudinally or transversely polarized protons
• Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
• Evolution and models for skewed parton distributions
• Off-forward quark distributions of the nucleon in the large N_c limit
• Deeply Virtual Compton Scattering off the neutron
• QED radiative corrections to virtual Compton scattering
• Measurement of Deeply Virtual Compton Scattering with a Polarized Proton Target
• The Beam--Charge Azimuthal Asymmetry and Deeply Virtual Compton Scattering
• Parton distributions: a new global analysis
• The HERMES Polarized Hydrogen and Deuterium Gas Target in the HERA Electron Storage Ring
• Off-forward gluonometry
• Nucleon hologram with exclusive leptoproduction
• The dual parameterization of the proton generalized parton distribution functions H and E and description of the DVCS cross sections and asymmetries
• On "dual" parametrizations of generalized parton distributions
• Future Measurements of Deeply Virtual Compton Scattering at HERMES
• Single--Spin Asymmetries in the Bethe--Heitler Process $e^{-}+p\to e^{-}+\gamma +p$ from QED Radiative Corrections
• DVCS at HERMES: Recent Results
• Moments of generalized parton distributions and quark angular momentum of the nucleon
• Hard exclusive scattering at Jlab

Cited by in corpus (47)

• The Spin Structure of the Nucleon
• Nucleon structure from mixed action calculations using 2+1 flavors of asqtad sea and domain wall valence fermions
• Generalized Parton Distributions in the valence region from Deeply Virtual Compton Scattering
• Deeply Virtual Compton Scattering off the neutron
• Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions
• Deeply Virtual Compton Scattering and its Beam Charge Asymmetry in e^\pm p Collisions at HERA
• The E00-110 experiment in Jefferson Lab's Hall A: Deeply Virtual Compton Scattering off the Proton at 6 GeV
• Beam-helicity and beam-charge asymmetries associated with deeply virtual Compton scattering on the unpolarised proton
• On timelike and spacelike deeply virtual Compton scattering at next to leading order
• Nucleon structure from basis light-front quantization
• Exclusive Leptoproduction of Real Photons on a Longitudinally Polarised Hydrogen Target
• Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections
• Unbiased determination of DVCS Compton Form Factors
• Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction
• Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target
• Interpretation of the Flavor Dependence of Nucleon Form Factors in a Generalized Parton Distribution Model
• Sum rules and dualities for generalized parton distributions: is there a holographic principle?
• Rosenbluth separation of the ${\pi }^0$ electroproduction cross section
• Border and skewness functions from a leading order fit to DVCS data
• Separation of contributions from deeply virtual Compton scattering and its interference with the Bethe--Heitler process in measurements on a hydrogen target
• Deeply Virtual Compton Scattering at a Proposed High-Luminosity Electron-Ion Collider
• HERMES impact for the access of Compton form factors
• Extraction of the Compton Form Factor H from DVCS measurements at Jefferson Lab
• First Exclusive Measurement of Deeply Virtual Compton Scattering off ${}^4$He: Toward the 3D Tomography of Nuclei
• Conceptual design of the Spin Physics Detector
• Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering
• Deeply virtual Compton scattering on a virtual pion target
• Towards the determination of the gluon helicity distribution in the nucleon from lattice quantum chromodynamics
• Transverse target spin asymmetries in exclusive ${\rho }^0$ muoproduction
• Spatial imaging of proton via leading-twist non-skewed GPDs with basis light-front quantization
• 2D energy-momentum tensor distributions of nucleon in a large-$N_c$ quark model from ultra-relativistic to non-relativistic limit
• Quark spin and orbital angular momentum from proton GPDs
• Beam charge asymmetries for deeply virtual Compton scattering off the proton
• Prospects for quarkonium studies at the high-luminosity LHC
• Polarized gluon distribution in the proton from holographic light-front QCD
• Extracting transition generalized parton distributions from hard exclusive pion-nucleon scattering
• The HERMES Recoil Detector
• Proton spin after 30 years: what we know and what we don't?
• The role of the GPD E in the determination of the parton angular momenta
• GPDs from present and future measurements
• Compton scattering: from deeply virtual to quasi-real
• Study of deeply virtual Compton scattering at the future Electron-Ion Collider
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Probing nucleon spin structure in deep-inelastic scattering, proton-proton collisions and Drell-Yan processes
• Beam Spin Asymmetries in DVCS with CLAS at 4 .8 GeV
• Assessing the impact of the electron ion collider in China on Deeply Virtual Compton Scattering
• New framework for extracting GPDs from exclusive photon electroproduction